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| author | Chao Yu <[email protected]> | 2018-08-05 23:04:25 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <[email protected]> | 2018-08-13 10:48:17 -0700 |
| commit | a33c150237a20d97a174243bc658c86502f9d370 (patch) | |
| tree | 1bdaea29bcb138882d6318eb3e151b2febceba2a /net/lapb | |
| parent | c7079853c859c910b9d047a37891b4aafb8f8dd7 (diff) | |
f2fs: fix avoid race between truncate and background GC
Thread A Background GC
- f2fs_setattr isize to 0
- truncate_setsize
- gc_data_segment
- f2fs_get_read_data_page page #0
- set_page_dirty
- set_cold_data
- f2fs_truncate
- f2fs_setattr isize to 4k
- read 4k <--- hit data in cached page #0
Above race condition can cause read out invalid data in a truncated
page, fix it by i_gc_rwsem[WRITE] lock.
Signed-off-by: Chao Yu <[email protected]>
Signed-off-by: Jaegeuk Kim <[email protected]>
Diffstat (limited to 'net/lapb')
0 files changed, 0 insertions, 0 deletions